Microsoft exchange server upgradation

I am looking for a freelancer who can help me upgrade my Microsoft Exchange Server from version 2016 to 2019 with a focus on improving security. The ideal candidate should have experience with Exchange Server upgrades and be knowledgeable about the latest security measures to ensure a smooth transition. Key requirements for this project include:

- Upgrade Microsoft Exchange Server from version 2016 to 2019
- Focus on improving security features and functionalities
- Experience with Exchange Server upgrades
- Knowledgeable about the latest security measures
- Ability to ensure a smooth transition to the upgraded server